Auto-Start NSD Spinner Gyro Ball – Up to 18,000 RPM Premium hand strengthener and wrist exerciser for grip strength training, forearm workout, and pain relief; durable and portable - Model PB688

Good quality.

This is an awesome product! Makes for great party conversations and competitions! I was hesitant about not picking a model with the electronic counter, but thought that since the counter faces your palm anyway, that you would no see it. There are 3 colors to help you know how fast you're going. The red LED indicates that the spinner turns at 1000rpm. The "purple" LED" indicates that you're at 4000rpm. When the spinner changes to a solid blue light, it means that you're turning at 7000rpm, which is about half the maximum speed of this model. I try to keep a cruising speed while this spinner stays on the blue color for a good work out! Yes, your forearms will start to feel the burn! :) I wish there could be more LED in this model to indicate maybe 10 000rpm and then 13 000 rpm. Still great gadget to train your grip!I highly suggest the autostart function! You just crank the rotor with your thumbs instead of using the red pull-string that comes with the other models (nothing to lose).

Es más de lo que podía esperar, es muy innovador, tanto que no podía creer que esta maravilla existiera, en tres días mi dolor de muñeca se quitó, ya qué pasó mucho tiempo usando el mouse, aparte me ha ayudado a fortalecer más que la muñeca. ¡La recomiendo ampliamente! Para los que pasan horas en los videojuegos o están mucho tiempo en la computadora - ¡Todo se vuelve más liviano en tu vida! 💪🏻 Además de los increíbles colores que llaman mucho la atención⚛️

I’ve owned a gyro like this before, but this is much superior: The biggest improvement on this for me is the spring loaded start up function, I hated using a string to start one of these up, then the ends would break off the string making it useless. This requires a little more wrist action to get it running after starting, but it works the same as any other gyroball after you do. I purchased this for rehabilitation from a broken wrist, I must strengthen the stabilization muscles of the wrist again now, this was recommended by my physiotherapist. The easy start up feature of this makes it much more practicle and desirable for me to just pick up and use regularly once or twice a day for a miniworkout. I couldn’t use this though until just today when my doctor told me the bone is pretty much fully healed, please check with your doctor as well before using to ensure it will not cause further damage if this is what you buy it for. It’s a great wrist strengthener as well though for anyone without injuries. The string based ones are good as well, but I will rebuy one of these before I go back to that kind of model.

Características tal cual están en la descripción. Producto de buena calidad.